发明名称 |
Dynamic downlink beamforming weight estimation for beamforming-space time code transmissions |
摘要 |
Techniques are provided to improve wireless beamformed communication between first and second wireless communication devices. At a plurality of antennas of the first wireless communication device (e.g., a base station) uplink transmissions sent from the second wireless communication device (e.g., a client or mobile device or station) are received. The first wireless communication device generates a downlink beamforming weight vector from received uplink transmissions, and computes a covariance matrix for received uplink transmissions. The first wireless communication device stores history information based on the covariance matrices for received uplink transmissions. The first wireless communication device computes first and second beamforming-space time code weight vectors based on the covariance matrix for an uplink transmission received in a current frame and the history information. The first wireless communication device uses the first and second beamforming-space time code weight vectors for a beamforming-space time code transmission technique to send a downlink transmission to the second wireless communication device. |
申请公布号 |
US8306001(B2) |
申请公布日期 |
2012.11.06 |
申请号 |
US20100687181 |
申请日期 |
2010.01.14 |
申请人 |
WANG GENYUAN;GUO LI;LOU HANQING;JIN HANG;CISCO TECHNOLOGY, INC. |
发明人 |
WANG GENYUAN;GUO LI;LOU HANQING;JIN HANG |
分类号 |
H04B7/216 |
主分类号 |
H04B7/216 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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